Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!swrinde!cs.utexas.edu!asuvax!ukma!usenet.ins.cwru.edu!ncoast!allbery
From: allbery@NCoast.ORG (Brandon S. Allbery KB8JRR)
Newsgroups: comp.sys.mac.comm
Subject: Re: Slow transfer rate on Telebit
Message-ID: <1991Mar21.031944.20999@NCoast.ORG>
Date: 21 Mar 91 03:19:44 GMT
References: <13477@darkstar.ucsc.edu> <28588@netcom.COM>
Reply-To: allbery@ncoast.ORG (Brandon S. Allbery KB8JRR)
Followup-To: comp.sys.mac.comm
Organization: North Coast Public Access Un*x (ncoast)
Lines: 35

As quoted from <28588@netcom.COM> by gandrews@netcom.COM (Greg Andrews):
+---------------
| In article <13477@darkstar.ucsc.edu> pete@saturn.ucsc.edu (Peter Hughes) writes:
| >	I have a telebit T2500 9600-baud modem.  I dial into a Unix
| >network using VersaTerm Pro.  Kermit gives me a transfer rate of about
| >30 bytes/sec, less than 3% of line capacity.  Xmodem crashes.
| >
| 
| Sounds like you're making the connection using the Telebit PEP
| modulation, but you're not turning on the Xmodem or Kermit protocol
| support.  Without protocol support enabled for the transfer protocol,
| transfers are extremely slow.
+---------------

Telebit configuration hint:  set the modem for S111=255 and for reset on loss
of DTR.  Then have the dial-out script set the protocol to be used *on
dialout*.  (Assumes BNU UUCP; g*d knows if the BSD folks have gotten over
their bout of NIH syndrome yet and come up with a way to do this.)  The
machine I use at work has separate service=uucp and service=cu Dialers files;
we set the modem for UUCP protocol on uucp dialouts and X/Ymodem on "cu"
dialouts.  (There are programs that can be used with cu's "~$" command.  Also,
I'm working on a program that will use the service=cu information.  I'll be
interested in seeing what breaks if I put a "service=qzt" in Sysfiles....)

On the Mac, you are presumably dialing out; have your terminal program
initialize the modem to Xmodem/Ymodem or Kermit (X/Y preferred, then use
Ymodem; Zmodem works but may not be quite as well optimized), or save that
setting in the modem.

++Brandon
-- 
Me: Brandon S. Allbery			    Ham: KB8JRR on 2m, 220, 440, 1200
Internet: allbery@NCoast.ORG		(QRT on HF until local problems fixed)
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